<template>
    <div>
        <!-- 面包屑区域 -->
        <el-breadcrumb separator="/">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>角色管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 新增按钮 -->
        <el-card class="box-card">
            <el-row>
                <el-col>
                    <el-button type="primary">添加角色</el-button>
                </el-col>
            </el-row>
            <!-- 角色列表区域 -->
            <el-table :data="rolelist" border stripe>
                <!-- 展开列 -->
                <el-table-column type="expand">
                    <template slot-scope="scope">
                        <el-row :class="['bdbottom',i1 === 0 ? 'bdtop' :'','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
                            <!-- 渲染一级权限 -->
                            <el-col :span="5">
                              <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                              <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!-- 渲染二级和三级权限 -->
                            <el-col :span="19">
                            <!-- 通过for循环嵌套渲染二级权限 -->
                                <el-row :class="[i2 ===0 ? 'bdtop' :'','vcenter']" v-for="(item2, i2) in item1.children"  :key="item2.id">
                                    <!-- 二级 -->
                                    <el-col :span="6">
                                        <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <!-- 三级 -->
                                    <el-col :span="18">
                                        <el-tag type="warning" v-for="(item3, i3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">
                                            {{item3.authName}}
                                        </el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                    </template>
                </el-table-column>
                <!-- 索引列 -->
                <el-table-column type="index"></el-table-column>
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
                <el-table-column label="操作" width="300px">
                    <template slot-scope="scope">
                        <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
                        <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
                        <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                    </template>
                </el-table-column>
            </el-table>
        </el-card>
        <!-- 分配权限的对话框 -->
        <el-dialog title="分配权限"
        :visible.sync="setRightDialogVisible"
        width="50%" @close="setRightDialogClosed">
        <!-- 树形控件 -->
        <el-tree :data="rightslist" :props="treeProps" @node-click="handleNodeClick" node-key="id" show-checkbox default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
        <span slot="footer" class="dialog-footer">
            <el-button @click="setRightDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="allotRights">确 定</el-button>
        </span>
    </el-dialog>
    </div>
</template>

<script>
export default {
  data () {
    return {
    // 所有角色列表数据
      rolelist: [],
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      // 所有权限的数据
      rightslist: [],
      //   树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点Id值数组
      defKeys: [],
      // 当前即将分配权限的角色id
      roleId: ''
    }
  },
  created () {
    this.getRolesList()
  },
  methods: {
    // 获取所有角色的列表
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')

      if (res.meta.status !== 200) {
        return this.message.error('获取角色列表失败')
      }
      this.rolelist = res.data
      console.log(this.rolelist)

    },
    // 根据ID删除权限
    async removeRightById (role, rightId) {
    // 弹窗提示用户是否要删除
      const confirmResult = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除!')
      }
      console.log('确认了删除')
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败!')
      }
      //   this.getRolesList()
      //   避免整体刷新,当前角色重新赋值权限
      role.children = res.data
    },
    // 展示分配权限的对话框
    async showSetRightDialog (role) {
      this.roleId = role.id
      // 获取所有权限数据
      const { data: res } = await this.$http.get('rights/tree')
      //   console.log(res)
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败!')
      }
      //   获取到的权限数据保存到data中
      this.rightslist = res.data

      //   递归获取三级节点Id
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    handleNodeClick () {},
    // 通过递归形式,获取角色下所有三级权限id,并保存到defKeys数组中
    getLeafKeys (node, arr) {
    // 如果当前node节点不包含children属性,则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed () {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights () {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      //   console.log(keys)
      const idStr = keys.join(',')
      const { data:res } = await this.$http.post(`roles/${this.roleId}roleId/rights`, { rids: idStr })

      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败!')
      }

      this.$message.success('分配权限成功!')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
  .el-tag {
      margin:7px;
  }
  .bdtop {
      border-top:1px solid #eee;
  }
  .bdbottom {
      border-bottom: 1px solid #eee;
  }
  .vcenter {
      display:flex;
      align-items:center;
  }
</style>
